42172532 has 6 divisors (see below), whose sum is σ = 73801938. Its totient is φ = 21086264.

The previous prime is 42172531. The next prime is 42172541. The reversal of 42172532 is 23527124.

It can be written as a sum of positive squares in only one way, i.e., 24245776 + 17926756 = 4924^2 + 4234^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42172531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5271563 + ... + 5271570.

It is an arithmetic number, because the mean of its divisors is an integer number (12300323).

Almost surely, 2^42172532 is an apocalyptic number.

It is an amenable number.

42172532 is a deficient number, since it is larger than the sum of its proper divisors (31629406).

42172532 is a wasteful number, since it uses less digits than its factorization.

42172532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10543137 (or 10543135 counting only the distinct ones).

The product of its digits is 3360, while the sum is 26.

The square root of 42172532 is about 6494.0381889853. The cubic root of 42172532 is about 348.0779871018.

Adding to 42172532 its reverse (23527124), we get a palindrome (65699656).

The spelling of 42172532 in words is "forty-two million, one hundred seventy-two thousand, five hundred thirty-two".